ignore template comments, fix bad test data

Signed-off-by: Matt Butcher <matt.butcher@microsoft.com>

pkg/lint/rules/template.go

@@ -188,10 +188,16 @@ func validateNoReleaseTime(manifest []byte) error {
 
 // TODO: I strongly suspect that there are better regexps than these two.
 var (
-	badTplStart = regexp.MustCompile(`{{-?[^-\s]+`)
+	badTplStart = regexp.MustCompile(`{{-?[^-\s\/]+`)
-	badTplEnd   = regexp.MustCompile(`[^\s-]+-?}}`)
+	badTplEnd   = regexp.MustCompile(`[^\s-\/]+-?}}`)
 )
 
+// validateWhitespaceAroundTemplateDirectives checks for formatting errors on tpl directives
+//
+// The recommendation is that templates add at least one whitespace character between the
+// directive marker ({{ or {{-) and the directive. This enforces that.
+//
+// See https://github.com/helm/helm/issues/5763
 func validateWhitespaceAroundTemplateDirectives(template string) error {
 	badMatches := []string{}
 	if matches := badTplStart.FindAllString(template, 10); matches != nil {

pkg/lint/rules/template_test.go

@@ -244,6 +244,7 @@ func TestValidateWhitespaceAroundTemplateDirectives(t *testing.T) {
 		`{{ legal }}{{illegal }}`:       false,
 		`{{ legal }}{{- legal -}}`:      true,
 		"{{\nlegal\n}}":                 true,
+		"{{/* comment */}}":             true,
 	} {
 		if err := validateWhitespaceAroundTemplateDirectives(example); (err == nil) != success {
 			st := "failure"